He says it has had a negative impact on the relationship between the “two largest nuclear powers in the world.”

Asked the US reporter questioned what did Trump mean calling U.S “foolishness and stupidity” which caused damage to the relationship between the US and Russia.

"I hold both countries responsible, I think we have all been foolish, we should have had this dialogue a long time to go, we are all to blame. We have a chance to do some great things, whether it is nuclear proliferation... I do feel we have both made mistakes."

He says “nuclear proliferation, in terms of stopping” is the most important thing for them to work on together.